Rail cover index attachment



FIG. 1 is a rear, bottom, left side elevation view of a rail cover index attachment attached to a firearm showing our new design;

FIG. 2 is a front, bottom, left perspective view of the rail cover index attachment of FIG. 1 with the firearm omitted;

FIG. 3 is a right side elevation view of the rail cover index attachment of FIG. 1;

FIG. 4 is a left side elevation view of the rail cover index attachment of FIG. 1;

FIG. 5 is a front elevation view of the rail cover index attachment of FIG. 1, the rear elevation view being a mirror image thereof;

FIG. 6 is a bottom plan view of the rail cover index attachment of FIG. 1; and,

FIG. 7 is a top plan view of the rail cover index attachment of FIG. 1.

The broken lines showing portions of the design in all figures is included for the purpose of illustrating environment and unclaimed features and forms not part of the claimed design. 

The ornamental design for a rail cover index attachment, as shown and described. 